Sand cutting and screening machine.



'J. H.: DALTON. I SAND CUTTING AND SCREENING MACHINE.

APPLICATION FILED OCT. I3. 1916 1 Patented; May 29,1917.

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- swwgy -J. H DALTON. .SAND CUTTING AND SCREENING MACHINE.

Patent-ed May 29,1911

3 $HEE TS-SHEE T 2.

"1. H. DALTON. SAND cunmc AN'D SCREENING MACHINE.

" APPLICATION FILED OCT. I3, 1916- Patented May 29,1917,

3 SHEETS-SHEET 3.

JOSEPH H. lDAlL'I'QN, 015

ST. PAUL, MINNESOTA.

senncur'rrne emu scnnnnrne MACHINE.

specification of aseasea.

Letters P ten Patented 2h, ill jt 12.

To all whom it may concern Be it known that I, Josnrn H. DALTON, a citizen of the United States, residing at St. Paul, in the county. of Ramsey and State of Minnesota have invented a new and useful Improvement in Sand Cutting and Screening Machines, of which the following is a specification. I This invention relates to an improvement in sand, .cutting and screening 'machines, and more particularly 'to a machine de signed to be used on the molders floor in the foundries and factories.

The object of this invention is to provide a portable machine for. cutting andscreening the molding sand by passing the machine over the floor on which thesand is left after having been used in molding.

/Vith this inventions good deal of manuallabor can" be saved, as the machine can be operated easily and quickly over the molding floor by one man, and the sand will be more thoroughly mixed and ,also cleaned of burned cores, scrap and other undesirable material which becomes mixed with the sand while molding.

It is anobject of this machine to have a revolving riddle or screen which is open on both ends and has a cone shaped deflector,

l centrally disposed on the axis thereof in the same. I

A further object is in a machinewhich is self-propelled and the riddle can be left out of operation when desired while moving the mach ine'from place to place.

Other features of this invention wilbbe more fully described in the following specification andclaims.

In the accompanying drawings which form part of this specification:

Figure 1, is a side elevation. of the machine.

2, is a top or plan view of the ma chine.

F 4, 3 and (3 are'details of various parts of the machine.

Fig. 7, is a diagrammatic view of the sand elevator, illustrating the raised and lowered position of the same.

in the drawing it represents an angle iron frame which is supported by forward wheels 1 and rear wheeis 2. lhe rear wheels 2 are slightly larger than the forward wheels. and are adapted to propel the frame over the molding floor, andv are preferably formed with a roughened sur the floor while driving the machine. The

' front wheels are adapted to guide the course which the frame takes over the floor when being operated. The wheels 1 are secured to a vertical shaft 6 which is freely journaled at the front of the frame A, so that the wheels can be turned by the steering rod 3 which is connected by a rack and gear or in any suitable way to a steering wheel l on one end, and to the arm'5 on the forward end. The arm 5 being rigidly secured to the journal shaft 6 of one of the front wheels 1. A tie rod 7 connects the two frontwheel 1 together in the usual way; y Y

,A riddle B is mounted on the frame A and is cylindrical in shape, being formed with'any desired meshof screening and open on both ends.' .The riddle being mounted with its axis on an angle with the frame A and rigidly secured to the shaft 8, which is positioned on the axis of the riddle. The forward end of theriddle is freely carried in the semi-dircumferential hearing 5), which is rigidly secured'to the frame A by the arm 10.

The semi-oircumferential bearing 9, is formed with a channel 0 in which the forward" outer end of the riddle B is adapted to rotate. llhe channel (it) having a depressed portion 61 in which rollers or ball. bearings 62 are adaptedto rest, so that the circlunference of the riddle T) will, roll or bear on the rollers 62, thereby, reducing the friction on the hearing 9.

A. cone shaped deflector C is centrally disposed in the riddle l3 and on the thereof, the apex of the cone being secured to the end of the shaft 8. Braces 11 are secured to the forward end of the deflector C and to the inner circumference of the riddle ll to holdthe deflector rigid in operation of the riddle.

The shaft 8 is formed in two parts, 25 and 26, which are held in axial alinei'nent with the riddle B by the bearings 12. The motor D is adapted to drive the shaft 8 through the gear 13 and the angle gear 1d, the gear 13 being rigidly mounted on motor shaft 15, and the gear l-l being rigidly secured to the portion 26 of the shaft.

A clutch 1c is interposed between the tar tions 25 and 2f of the shaft 8, the clutch being of the ordinary tooth construction, a l adapted to be operated by the handle Thus, the riddle ll he inrown into out i-llll of operation by means of the clutch 16 during the operation of the motor D. The rear wheels 2 are adaptedto be propelled by the motor D, by means of the gears 13 and 14, and bevel gear 17. on the end of-the shaft 8 meshing with the bevel gear 18, which is mounted upon the transv'er'se-'-shaft-,19 andgear 20 mounted on the shaft 19 meshing -with gear .21, which is mounted upon the .transverse shaft 22. Shaft 22 bemg con nected hv means ofs'prockets and chain 23 with the rear wheels Thus,,it is evident that when it. is desired to drive themachine or frame A by'turning on a switch which is not illustrated, the machine can be propelled over the molding; lloor. It is obvious that the motor can be so arranged as to operate in either direction, and thus, operate the machine forward or backward desired, and that any suitable motive power, such as gasolene engine, etc, can be used to take the place of the motor D.

A-n elevator E is carried by the forward end of the frame A by frames F and Gr. The frames F and G being rigidly secured to the frame A. The elevator I) being composed of an endless belt 27, whichis a trifle narrower-than the diameter of the riddle B, and carries a series of cups 28, the cups 28 being practically the same length as the width of the carrier belt 27. The upper end of the belt 27 is carried by the roller 29,

which is mounted upon the shaft 30, and the lower end ofthe belt passes over the roller 31 which is carried by the transverse shaft- 32. Bellcrank arms 33 which are pivotally connected to the frame F at are adapted to hold the shaft 82 in the positions illus trated in Figs. 1 and 7.

The bellcrank arm on one side is pivot- 'ally connected at 35 to the-operating rod 36,

. and the other end of the rod 36 is pivotally of ordinary construction.

connected at 37 to the lever. 38, which is pivoted to the frame A at 39, andhas a handle 40 on its opposite free end by which the lever 38 can he engaged to operate it back and forth on the quadrant ll, which is The lever 38 is equipped with an loelung dog 4-2 which engages in the notches 43 inthe quadrant Thus, when the lever 38 is placed in the forward position as is lllustrated in Fig. 1, the elevator E is placed,

in'operating position, so as to have thecups 28 pass n close inoxnmty to thefloor upon which the niaehineis operating. Arms 44 I y are pivotally" connected to the bellcrank levers 33 at 45 on one end, and the other end freely engaging a lug 46, wh1ch 1s rlgidly connected to the frame F. Thus when the lower end of the elevator E is dropped into the position illustrated in Fig. 1, the arms I 44 will limit the forward movement of the bell crank arm 33, and also assist, in holding the lower end of the elevator rigid, while ordinary pelled forward. a

When it is desired to raise the lower end the machine is in operation andtbeing pro- 1 of the elevator E the lever 38 is pulled into I the backward position, raising the lower end of the elevator E as 'is illustrated in Fig. 7. The free endsLof the arms 44 slidingbackward on the frame F.

The elevator E is adapted to beeperated by 'the motor D throligh the shafts 15,48

' and 49. The shafts 48 and 49 being driven by bevel gears which connect the shafts 48 ahd 49 with thepdriving shaft 15. The bevel gears being. inclosed in protecting housings 50. The shaft 49 extends longitudinally with the frame Ajto the forward end of the frame, and has a'pulley 51 secured to the forward end of the same over which a belt 52 is adapted to pass. The belt 52 is crossed in the usual manner as illustrated in F ig. l and passes over pulley 53 which is secured to the transverse shaft 3( atthe upper end f of the. elevator 1*). Thus, it is evident that when operating the machine the motor .D

will drive the elevator I!) through the shafts 15, 48 and49 and by means, of the belt 52. o

A tooth clutch fi tgisinterposed between the two parts of the. shaft 15 and is of the I ordinary construction, as is illustrated in Figs. 5 and 6, being-also similar to the clutch 16. Thus, when it is desired the elevator can be thrown in or out of operation by means of the clutch It is obvious that the elevator E may be driven in any other-suitable way from the source of motor 'power, such as the motor D, and that in place of the belt 52, a chain may be used which is also true of the belt 27, it being evident that link chainsymay be used to hold the cups 28 and carry the same up to the elevator.

In operation the sand cutting machine is propelled over the molding floor with the lower end of the clevatorll raised as illustrated in Fig, 7, and out of operation. The

riddle B also being); out of operation until.

the machine has been brought up to where the moldingsand is located, on the molding floor. Then bynieans of the lever 38 the lower end of the elevator l) is dropped into v.theposition illustrated in Fig. 2, and the onto the moldingfloor directly under theframe A. The burnt cores, scrap and other lf the velevator It is run at a high undesirable inateria l \,,vill slide along the lower surface of the riddle to the rcarof the same, and be deposited into a receptacle The receptacle 55 extending trans versely across the frame A, and being secured thereto. Deflectors 58 are secured to the lower part of the frame-A just below the riddle 13, which tend to deposit thesame passing through the riddle centrally below the machine,

The operator of the machine steers the same by means of the handle 4 from place to place over the molding floor. lVith this machine it is thus possible 'to thoroughly mix and clean the molding sand on the molding floor after it has been used'in castin or in molding, and leaveit in a neat an compacted shape ready to be used-for moldand'when it is mixed by hand, it is pretty hard to thoroughly clean the same. Thus, by the use of this-,maehinc the life of the sand will be lengthened and the castings obtained from the same will average Very muchbetter. As the elevator E 1s so arranged that the sand elevating cups run in ClOSOI'H'OXIIHItY to the floor, practically all of the same .will pass through the machine when the machine passes over the sand in operation. r v

As the sand is carried by the elevator E into the riddle B, it-is thoroughly agitated and sieved in passing throughthe riddle and any particles too large to pass through the screen of the riddle are carried back into the receptacle 55.

\Vhile I have illustrated one form'of construction and combination of parts, I desire to have it mulerstood that this is only illustrative, and that my invention can be carried out by other means and applied to other uses within the scope of the following claims. t

WVhat I claim is: 1. A self propelled sand cutting and screening machine comprising, a supporting frame, a rotatable riddle carried by said frame, wheels for carrying said frame, means for holding said riddle with the area of its sand receiving and free of any oh;

structions, a deflector axiallyhcld in the rear of said riddle and an elevator adapted face of said riddle, thereby preventing the sand from'passing through said riddle Without beingscreened.

3. In a device of the class described having a supporting frame, wheels for carrying said frame, a screen mounted on said frame adapted to screen sand deposited therein, a sand conducting elevator having its upper end immovably mounted on said frame adjacentthe receiving end of said screen, and means pivoted on said frame for raising or lowering the lower end of said elevator, substantially as described. I

4. In a self propelled sand cutting and screening machine adapted for use on a molders floor, comprising, a supporting frame driving, wheelsby which said frame is carried, a riddlemounted to be rotatable on said frame, an elevator to conduct the material being treated from the floor' and feed itto said riddle, said riddle. being open on both ends and mounted to a driving shaft onone end with its receiving end completely open and clear of any obstructions so as to freely receive the material fromsaid elevator, a. receptacle extending across said frame directly below the rear end of said riddle so that the waste material only will fall directly from the rear end of said riddle into said receptacle and means for operating said riddle and for propelling said machine.

5. A self propelled sand cutting and screening machine comprising a supporting frame, a rotatable riddle carried by said frame, Wheels On which said frame is mounted, a conical deflector axially supported by its apex in said riddle, said deflector and riddle having an open receiving end free of any obstructions, an elevator to conduct sand from the floor and feed it into said deflector. means for simultaneously operating said riddle and elevator while said machine is being-propelled whereby sand is deposited into said deflector by said conductor and is freeto be spread from the surface of said deflector to the surface of said riddle, substantially as described.

JosarH i1. nation; 

